Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7928252 | Optics Communications | 2016 | 5 Pages |
Abstract
We have experimentally presented a digital coherent receiver employing photonic aided bandpass sampling technology for phase-modulated radio-over-fiber (RoF) links. An optical intensity modulator (IM) is utilized as the bandpass sampler which performs encoded on-off keyed pulse sequence on the optical local oscillator. Quaternary Phase Shift Keying (QPSK) modulated data signal with 20Â MHz bandwidth at 5.2Â GHz, 10.2Â GHz and 15.2Â GHz RF carrier frequency is experimentally demonstrated to be successfully detected by using balanced photodiodes (BPDs) with only 800Â MHz analog bandwidth. It demonstrates that the required analog bandwidth of BPDs and ADCs can be dramatically reduced in a direct sampled coherent RoF communications system.
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Authors
Minghua Cao, Jianqiang Li, Jian Dai, Yitang Dai, Feifei Yin, Yue Zhou, Kun Xu,